# Information sets and alternate timing

**URL:** https://forum.dynare.org/t/information-sets-and-alternate-timing/417
**Category:** Dynare help (legacy posts)
**Created:** [10 August 2007 20:18 UTC](https://forum.dynare.org/t/information-sets-and-alternate-timing/417 "2007-08-10T20:18:06Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![jd\_prada](https://forum.dynare.org/letter_avatar_proxy/v4/letter/j/a183cd/32.png) [@jd\_prada](https://forum.dynare.org/u/jd_prada)
#### Post date: [10 August 2007 20:18 UTC](https://forum.dynare.org/t/information-sets-and-alternate-timing/417/1 "2007-08-10T20:18:06Z")

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Hi

I am trying to replicate the now classic model by Christiano, Eichenbaum and Evans (JPE 2005). In this model, besides many usual rigidities, a key assumption is that the decisions are made taken into account not the information until t, but the information until t-1. That is, some expressions will have E\_{t-1} instead of E\_{t}. This generates that the reaction of the inflation to a monetery policy shock is “delayed”, generating a smooth pattern. That is, inflation and other variables do not jump in the moment of the shock because that shock was unexpected in t-1.  
I don’t know how to do this in Dynare. Is there any way of introducing different timing in expectations, thus different information sets?

Thanks

JD